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An emb-145 captain noted that; although they had been accumulating rime ice on the windshield the icing valves had not automatically opened. When he opened them manually the EICAS opined 'anti-ice on/no icing.'
| Attributes | |
| ACN | 1162997 |
| Time | |
| Date | 201404 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Environment | |
| Flight Conditions | IMC |
| Aircraft 1 | |
| Make Model Name | EMB ERJ 145 ER/LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Pneumatic Control Valves |
| Person 1 | |
| Function | Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
Descending through precipitation; we accumulated moderate rime ice on the windscreen. I looked up at the anti-ice valves and saw they were closed. I waited approximately a minute and a half for them to open [automatically]; then I manually selected them on; after which we received the anti-ice on no icing message on the EICAS. The ice detectors did not detect ice for two to three minutes after overriding the automatic function. After the anti-ice system automatically turned on it stayed on for five consecutive minutes. The start of the event was around 17;000 ft and a tat -16C. The event ended around 11;000 ft and a tat -11C. We had no further issues.
Original NASA ASRS Text
Title: An EMB-145 Captain noted that; although they had been accumulating rime ice on the windshield the icing valves had not automatically opened. When he opened them manually the EICAS opined 'Anti-ice On/No Icing.'
Narrative: Descending through precipitation; we accumulated moderate rime ice on the windscreen. I looked up at the anti-ice valves and saw they were closed. I waited approximately a minute and a half for them to open [automatically]; then I manually selected them on; after which we received the Anti-Ice On No Icing message on the EICAS. The ice detectors did not detect ice for two to three minutes after overriding the automatic function. After the anti-ice system automatically turned on it stayed on for five consecutive minutes. The start of the event was around 17;000 FT and a TAT -16C. The event ended around 11;000 FT and a TAT -11C. We had no further issues.
Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.